Description:
CNC Machining for Stainless Steel Large Flange
Material:
Stainless Steel
Finish:
Grinding, Polishing
Machine Tools:
Cutting Machine, Lathe, Drilling Tools
Dimensions:
As Required
Dimensions Measuring:
Coordinate Measuring Machine (CMM)
Large diameter flanges can be manufactured out of any steel material grade. They come in flange faces that include:
RTJ (Ring Type Joint)
RF (Raised Face)
FF (Flat Face)
Some of the most common applications for the large diameter flanges are for subsea / onshore pipelines and ASME pressure vessels.

Custom made large diameter flanges can come as large as the customer requires and made to their design specs. Our extensive heavy-duty manufacturing capability combined with a large inventory of plate stock allows us to meet the most complex and challenging quality and delivery requirements. We leverage numerous fabrication methods, including plate burning, CNC and conventional machining, automated flange drilling, robotic welding with automatic positioning, and many other state-of-the-art technologies to produce flanges with precise tolerances and fine surface finishes. Our expertise spans all flange types, including blind and reducing flanges, spectacle and paddle blinds, O-rings and Victaulic rings, adapter rings, and many other custom flanges. We can provide thermal stress relief, die-stamp/etching identification markings, and apply protective coatings, all in-house.
As an ISO compliant manufacturing company, we perform both in-process and final inspections to ensure flange quality. In addition to traditional dimensional measurement equipment, we use high-end laser devices to verify tolerances. We offer non-destructive testing (NDT) on flanges for the most stringent applications to confirm they are defect-free. We provide material traceability and inspection reports to document that our products meet the highest standards of excellence.
Send us your drawing, and we will reply with a quote. We offer same day shipment for stock items and provide rush and emergency services when time is a factor or service is interrupted. For more detailed information about our standard and custom flange products, contact us at sales3@openex.com.cn now.
| Flange Manufacturing Capabilities | ||
| General Capabilities | Flange Marking | Thermal Stress Relieving |
| CNC Drilling | Taping | |
| CNC Machining | Coating | |
| Conventional Machining | Non-Destructive Testing | |
| Counter Boring | Robotic Welding | |
| Counter Sinking | Automatic Welding Positioners | |
| Materials | Carbon Steel | A572-50 |
| A105 Forging | A588 | |
| A36 | HSLA | |
| A516-70 | Stainless Steel (304/304L & 316/316L) | |
| Finishing Services Available | Painting | Marking |
| Coating | Stamping | |
| Tolerance (+/-) | Industry Standard Tighter Tolerance* | |
| Inspection Services | Laser Tracker Inspection | |
| Non-Destructive Testing | ||
| *Traditional Dimensional Measurement Equipment | ||
| Additional Information | ||
| Industry Focus | Water Works | Heavy Industry |
| Wind Tower | Machine Tool | |
| Utilities | Marine | |
| Aerospace | Military | |
| Agricultural | Mining | |
| Architectural | Oil Field | |
| Auto/Truck/Transportation | Steel Mill | |
| Chemical | Packaging/Converting | |
| Construction | Power Generation | |
| Food | ||
Surfacing tube sheets play a crucial role in the efficient and reliable operation of boilers. These critical components act as sturdy foundations for heat exchange tubes, ensuring optimal performance and safety. In a recent project, our company successfully delivered six custom-made surfacing tube sheets to a prestigious customer in Japan. With exacting standards and stringent quality requirements, this project demanded exceptional precision and expertise.

The production journey of these custom-made surfacing tube sheets encompassed various stages, each meticulously executed to ensure superior quality and performance. Here is a breakdown of the manufacturing process:

As a leading provider of high-quality tube sheets and other metal components, our company has a proven track record of delivering outstanding results for customers worldwide. With a solid commitment to precision, expertise, and customer satisfaction, we specialize in custom metal fabrication solutions that meet even the most demanding requirements.
If you are in need of custom-made surfacing tube sheets or any other metal components, we invite you to get in touch with our team. We are dedicated to collaborating closely with our customers to deliver tailored solutions that exceed expectations. Contact us at yuki.zhou@openex.com.cn today to discuss your project requirements and experience the difference between working with a trusted industry partner.
Flanges play a crucial role in connecting pipes, valves, and other equipment in various industries. They provide a secure and leak-proof joint, ensuring the safe and efficient operation of fluid systems. In this project case study, we present our successful collaboration with a Japanese customer to custom manufacture 200 sets of high-precision custom-made steel flanges. Each set comprises four specifications, manufactured from top-grade 304L and 316L stainless steel. The project demanded meticulous attention to detail, as the customer had exceptionally stringent requirements for flange accuracy and surface fineness.
Custom-made flanges offer several advantages over their standard counterparts. By tailoring the flanges to meet the unique requirements of a specific application, companies can achieve enhanced performance, reliability, and safety. Custom flanges provide a precise fit, eliminating the need for costly modifications or compromises in the installation process. They also offer increased resistance to corrosion, improved pressure containment, and reduced leakage, ensuring optimal system efficiency.
Our project commenced with detailed consultations and collaboration with the Japanese customer. We carefully analyzed the provided drawings, specifications, and requirements, fully understanding their unique needs. Clear communication was vital to ensure accurate interpretation and translation of the customer's vision into a tangible product.
At Openex, we specialize in high-quality custom-made flanges that precisely meet the unique needs of our customers. With our state-of-the-art facilities, skilled workforce, and commitment to excellence, we ensure superior products that exceed expectations. Whether it's a standard or custom design, we prioritize accuracy, surface finish, and overall quality to provide flanges that perform flawlessly in demanding environments.
If you require custom-made flanges or have unique specifications for your project, we invite you to collaborate with our expert team. Contact us today at yuki.zhou@openex.com.cn to discuss your requirements and witness the exceptional quality and precision we offer.
In seawater desalination, tube sheets and baffles play a critical role in ensuring the efficient transfer of heat between saltwater and freshwater. Tube sheets are typically circular or rectangular plates with holes drilled in them to hold the tubes, while baffles are used to direct the flow of the water through the tubes. In a recent project, Openex was tasked with manufacturing 292 tube sheets and 216 baffles made of S32304 duplex stainless steel. The dimensions of each plate were 2000mm wide and 5800mm long, with 14,389 holes on each plate.
The project presented a significant challenge due to the high precision and tight delivery time requirements of the customer. The traditional machine tools and processes of ordinary processing companies could not meet the customer's needs. To overcome this challenge, Openex relies on its advanced CNC drilling machines and rich experience in tube sheet manufacturing. We had 42 CNC drilling machines, including 11 sets of deep-hole drilling machines and 31 sets of CNC multi-hole drilling equipment from Italy Innse, Korea Daeyang, Shenyang Zhongjie, Wu Chong, etc.
To ensure the smooth implementation of the project, we convened the tube and plate manufacturing department, technical department, quality assurance department, and other related departments to create a perfect production plan. They coordinated the arrangement of staff and equipment to ensure that the 508 pieces of tube sheets and baffles were produced with high quality, efficiency, and delivered on schedule. 20 sets of CNC multi-drilling equipment were involved in the production at the same time.
The manufacturing process of tube sheets and baffles requires high precision and attention to detail. The first step is to prepare the duplex stainless steel plates and cut them into the required size Then, the plates are loaded onto the CNC drilling machines, where the holes are drilled according to the specified pattern. The holes must be precise in size and spacing, and the depth must be accurate to ensure that the tubes and fins fit perfectly.
After the holes were drilled, the tube sheets and baffles were then heat treated. This process was necessary to improve the strength and toughness of the material. The final step was to inspect the tube sheets and baffles for quality assurance. This was done using a variety of methods, including visual inspection, ultrasonic testing, and dye penetrant testing.
The production of 508 pieces of tube sheets and baffles required a significant amount of resources and expertise. The company's ability to deliver high-quality tube sheets and baffles in large volumes is a testament to its advanced technology, skilled workforce, and commitment to customer satisfaction. The use of CNC drilling machines and the coordination of various departments ensured that the project was completed within the tight deadline and met the customer's expectations.
Overall, the production of custom duplex stainless steel tube sheets and baffles in large volumes is a complex undertaking that requires advanced technology, skilled workforce, and coordination between various departments. This project case showcases our capability to supply high-quality tube sheets and baffles that meet the customers' precise requirements.
Openex is a leading metal fabricator with rich experience in heat exchanger components, including tube sheets, baffles, and other related products. With over 20 years of experience in the industry, we have established a reputation for delivering high-quality products that meet the most stringent customer requirements. Our advanced CNC drilling machines and skilled workforce enable us to produce custom tube sheets and baffles in large volumes, ensuring timely delivery and customer satisfaction.
If you have any questions or inquiries about tube sheets and baffles or any other metal fabrication services, please do not hesitate to contact us at yuki.zhou@openex.com.cn. We look forward to working with you.
More tube sheets and baffles cases:
For more tube sheets and baffles supply cases, feel free to contact us.
Custom-made blind flanges are essential components in the oil and gas industry. They are used to seal the end of a pipeline, preventing the flow of fluids or gases. These flanges are typically made to order based on specific project requirements. In this project, we will discuss the production of 63 pieces of custom-made blind flanges, with a thickness of 56mm.
The client required blind flanges with specific dimensions and material specifications. The flanges had to be 56mm thick and made of carbon steel. Our engineers worked closely with the client to ensure all the specifications were met.
The manufacturing process began with the selection of high-quality carbon steel plates. The plates were cut to the required size using a plasma-cutting machine. Next, the flange faces were machined to the correct size and finish.
The blind flanges were then shaped using a hydraulic press to ensure that they met the exact dimensions required. The flanges were then drilled with bolt holes to allow for easy installation.
Finally, the blind flanges were coated with rust-resistant paint to ensure their longevity in the harsh environments of the oil and gas industry.
Custom-made blind flanges are essential components in the oil and gas industry, ensuring the safe and efficient flow of fluids and gases. This project highlights our expertise in producing high-quality blind flanges to meet specific project requirements.
At Openex, we are committed to delivering high-quality products and services to our clients. With our state-of-the-art manufacturing facilities and experienced team of engineers, we can provide various types of custom-made flanges to meet any project requirement.
If you have a project that requires custom-made flanges or any other industrial components, please don't hesitate to contact us. Our team is always ready to provide the best solutions to meet your needs.
A few days ago, a batch of stainless steel tube sheets manufactured for evaporators used in sugar-making passed customer inspection and were well received.
There were 20 stainless steel tube sheets with a thickness of 32mm and diameter of 5000mm and 5500mm. The customer has strict requirements on the location and distribution of tube holes. With rich experience in tube sheet manufacturing, we quickly determined the appropriate processing program, and finally met the customer's high standard requirements and smooth delivery.
A tube sheet is a component used in heat exchangers, boilers, and other industrial applications. In sugar making, tube sheets are used in evaporators to separate the heating fluid from the sugar juice.
The tube sheet serves as a support for the evaporator tubes and provides a barrier between the heating fluid and the sugar juice. The heating fluid is typically steam, and it is circulated through the tubes to heat the sugar juice, which is contained in the evaporator shell surrounding the tubes.
The tube sheet must be made of a material that can withstand the high temperatures and pressures involved in the sugar-making process. Common materials for tube sheets in sugar-making applications include stainless steel, carbon steel, and copper alloys.
The design of the tube sheet must also take into account factors such as tube diameter, thickness, and spacing to ensure efficient heat transfer and minimize fouling or clogging of the tubes. Proper maintenance and cleaning of the tube sheet and tubes are also critical to ensure the longevity and optimal performance of the evaporator.
When it comes to the manufacturing of tube sheets for industrial applications, choosing a reliable and experienced manufacturer is crucial. Openex can provide high-quality products that meet the specific needs and requirements of customers. Whether you need tube sheets for heat exchangers, boilers, or other industrial applications, Openex can ensure that you receive products that are durable, efficient, and cost-effective. With a team of skilled engineers, state-of-the-art facilities, and a commitment to customer satisfaction, we can be your go-to partner for all your tube sheet needs. Contact us at sales3@openex.com.cn today to know how we can help you achieve your industrial goals.
Openex recently manufactured a batch of custom flanges for a chemical customer, and more than the flanges were well received by the customer.
The flanges are made of 20mm thick 316L stainless steel with diameters of 1.3m, 1.8m, and 2.1m respectively. The manufacturing of the flanges needs the following steps: grinding, waterjet cutting, welding, shaping, machining, etc. The customer has high requirements on the indicators such as shape and precision. Through this cooperation, the customer deeply appreciated our processing capacity and quality control and indicated that they would preferentially choose to cooperate with us for similar orders in the future.
Custom flanges are flanges that are designed and manufactured according to specific requirements or specifications, rather than being off-the-shelf or standard products. Custom flanges are often used in applications where standard flanges are not suitable due to factors such as size, shape, or material requirements.
There are many reasons why a custom flange may be required, such as to meet specific dimensional requirements, to match a non-standard piping or valve connection, or to work with an existing piece of equipment. Custom flanges can also be used to improve performance, reduce maintenance, and increase safety in specific applications.
Custom flanges can be manufactured from a variety of materials, including carbon steel, stainless steel, alloy steel, and other metals, as well as plastics and composite materials. They can be designed to match specific pressure and temperature ratings, as well as to accommodate various types of gaskets, bolts, and sealing systems.
Openex is a global manufacturer of various flanges. Upon request, we manufacture the forging of flanges and blinds that are custom-designed to customer dimensional requirements. We have an extensive track record of producing flanges from a wide variety of material grades. Our extensive raw material inventory allows us to manufacture forged flanges to the most challenging customer-specified product chemistry requirements.
Our extensive heavy-duty manufacturing capability combined with a large inventory of plate stock allows us to meet the most complex and challenging quality and delivery requirements.
Send us your drawing, and we will reply with a quote. We offer same day shipment for stock items and provide rush and emergency services when time is a factor or service is interrupted. For more detailed information about our standard and custom flange products, contact us at sales3@openex.com.cn now.
Our expertise spans all flange types, including:
| Flange Manufacturing Capabilities | ||
| General Capabilities | Flange Marking | Thermal Stress Relieving |
| CNC Drilling | Taping | |
| CNC Machining | Coating | |
| Conventional Machining | Non-Destructive Testing | |
| Counter Boring | Robotic Welding | |
| Counter Sinking | Automatic Welding Positioners | |
| Materials | Carbon Steel | A572-50 |
| A105 Forging | A588 | |
| A36 | HSLA | |
| A516-70 | Stainless Steel (304/304L & 316/316L) | |
| Finishing Services Available | Painting | Marking |
| Coating | Stamping | |
| Tolerance (+/-) | Industry Standard Tighter Tolerance* | |
| Inspection Services | Laser Tracker Inspection | |
| Non-Destructive Testing | ||
| *Traditional Dimensional Measurement Equipment | ||
| Additional Information | ||
| Industry Focus | Water Works | Heavy Industry |
| Wind Tower | Machine Tool | |
| Utilities | Marine | |
| Aerospace | Military | |
| Agricultural | Mining | |
| Architectural | Oil Field | |
| Auto/Truck/Transportation | Steel Mill | |
| Chemical | Packaging/Converting | |
| Construction | Power Generation | |
| Food | ||
Recently, we have successfully provided a batch of flange processing services for a printing and dyeing machinery project. The flange is first formed by water cutting. Then the vertical machining center is used to complete the surface milling, the CNC lathe is used to complete the grain milling, and finally, the fitter completes the finishing process.
The flange parts are the key parts of printing and dyeing equipment. The accuracy is directly related to the sealing performance of the whole equipment. Therefore, the customers have strict requirements for accuracy. According to customers' requirements, our technical team developed a special processing program, which takes full account of maximization of the total utilization rate of materials to ensure the processing quality of products, and reduces the purchasing cost for customers as far as possible.

A flange is a method of connecting pipes, valves, pumps, and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed.
Openex is a global manufacturer of various flanges. Upon request, we manufacture the forging of flanges and blinds that are custom-designed to customer dimensional requirements. We have an extensive track record of producing flanges from a wide variety of material grades. Our extensive raw material inventory allows us to manufacture forged flanges to the most challenging customer-specified product chemistry requirements.
General Capabilities:
Flange Manufacturing Types :
Waterjet Cutting(25 sets of machines)
Specialty: Thick Plate (Almost all materials)
Advantages: High Accuracy, Smooth Section, No Deformation, Thick plate
Waterjet Cutting Capability Max: thickness 200mm width 4010mm length 12000mm
Contact us at sales3@openex.com.cn or call us at +86 186 5928 0806 for more information about waterjet cutting/flange or to receive a free project quote today.
Those customized rectangular flanges are used for heat exchangers.
A flange is a method of connecting pipes, valves, pumps, and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed.
Openex is a global manufacturer of various flanges. Upon request, we manufacture the forging of flanges and blinds that are custom-designed to customer dimensional requirements. We have an extensive track record of producing flanges from a wide variety of material grades. Our extensive raw material inventory allows us to manufacture forged flanges to the most challenging customer-specified product chemistry requirements.
General Capabilities:
Flange Manufacturing Types :
Materials:
General Processing:
Diameter:
Up to 10 meters OD
Contact us at sales3@openex.com.cn or call us at +86 186 5928 0806 for more information about manufacturing for flanges and to receive a free project quote today.